How delete old maps for Base Camp and in nuvi2455?

Former Member
Former Member
Trying to clean up my HD.
Base camp indicates I have 2014.4, 2015.1 & 2015.2 installed. in C:\Program Data\Garmin\Maps etc
Problem is I can't find the folder to delete the two old map files using Win Explorer


ALSO my nuvi 2455LM memory is red and almost full. When I check MyMaps to see what I can clear out no maps are shown.

If I simply plug in a USB I find lots of foreign language files and other stuff filling up the onboard 3.6GB (only 180MB free)
1. I assume I can delete all the language files except those ending in .en
2. Same for Voice files

Thanks in advance for response